From chapter 13 on Acts becomes the Adventures of Paul. Paul and Barnabas are sent from Antioch first to Cyprus where Mark returns to Antioch, and then Paul and Barnabas go to Antioch in Pisidia. (Antioch seems to be a popular name for a city.)
They go to the synagogue and are invited to speak. Paul does so, which you can read in Acts 13:16-41. Afterwards they are urged to return the next week and speak again, when almost the whole city, Gentiles included, come. Results are mixed; some believe Paul’s message and rejoice, others are angered by it and drive Paul and Barnabas out of town.